This circuit, found in a 1964 US documentation, consists of a selective amplifier that lets only 10 Hz pass around a 400 Hz center frequency with the indicated components.
We found this circuit in a 1976 documentation. The circuit uses a double gate MOSFET. The circuit...
This circuit is from the 1993 Linear Technology Applications. The circuit has a 5 A output. The...
This oscillator with the 4049 can generate signals up to about 14 MHz according to the article in the...